const Koa = require('koa')
const app = new Koa()
const views = require('koa-views')
const json = require('koa-json')
const onerror = require('koa-onerror')
const bodyparser = require('koa-bodyparser')
const logger = require('koa-logger')
const mongoose = require('mongoose')

const DB_URI = `mongodb://root:xuhui123@dds-bp117af24a44e3641230-pub.mongodb.rds.aliyuncs.com:3717,
                dds-bp117af24a44e3642308-pub.mongodb.rds.aliyuncs.com:3717/riverLink?replicaSet=mgset-5630495`

/* 连接数据库 */
mongoose.Promise = require('bluebird')
mongoose.connect(DB_URI)

const index = require('./routes/index')
const users = require('./routes/users')

// error handler
onerror(app)

// middlewares
app.use(bodyparser({
    enableTypes: ['json', 'form', 'text']
}))
app.use(json())
app.use(logger())
app.use(require('koa-static')(__dirname + '/public'))

app.use(views(__dirname + '/views', {
    extension: 'hbs',
    map: {
        hbs: 'handlebars'
    }
}))

// logger
app.use(async (ctx, next) => {
    const start = new Date()
    await next()
    const ms = new Date() - start
    console.log(`${ctx.method} ${ctx.url} - ${ms}ms`)
})

// routes
app.use(index.routes(), index.allowedMethods())
app.use(users.routes(), users.allowedMethods())

// error-handling
app.on('error', (err, ctx) => {
    console.error('server error', err, ctx)
})

module.exports = app
